All categories

3 years ago

Jane has 60 liters of 70% of acid solution. How many liters of water must be added to form a solution that is 40% acid?

1 answer:

4 0

Let w = liters of water needed
4.70= acid in 40% solution

4.70/70+w = .28

28=.28.(70+w)
70+w=100
w=30

30 liters of water is needed

You might be interested in

#17-1: Simplify this complex fraction. 1/3 / 6/9

Gnesinka [82]

$\huge{\boxed{\frac{1}{2}}}$

To divide by a fraction, you multiply by its reciprocal, which you find by flipping the numerator and the denominator. $\frac{1}{3} \div \frac{6}{9} = \frac{1}{3} * \frac{9}{6}$

Multiply the numerators and the denominators separately. $\frac{1}{3} * \frac{9}{6} = \frac{1*9}{3*6} = \frac{9}{18}$

Simplify by dividing both sides of the equation by $9$ . $\frac{9 \div 9}{18 \div 9} = \boxed{\frac{1}{2}}$

3 0

3 years ago

Read 2 more answers

The square of a number plus the original number is 22 what could the number be?

arlik [135]

Answer:

x²+22

Step-by-step explanation:

let the number= X

x²+22

7 0

3 years ago

Read 2 more answers

Use the following scenario to answer the question below:

Aleks [24]

Answer:

9 hr * 60 min/hr = 540 min. 540 min * 60 sec/min = 32,400 sec. Use the method described by panic mode: round the number down until there is only one non-zero digit left. Here, 32,400 rounds down to 30,000. Now count the number of zeroes; the result is the order of magnitude: 4. (You see this in scientific notation also: 30,000 = 3 × 10^4.)

5 0

2 years ago

Write $1,234.56 in words, as it would appear on a check.

aliya0001 [1]

Answer:

one thousand two hundred thirty four & 56/100

3 0

3 years ago

Read 2 more answers

Which of the following is the simplified form of fifth root of x times the fifth root of x times the fifth root of x times the f

Juliette [100K]

Answer:

$\large\boxed{x^\frac{4}{5}}$

Step-by-step explanation:

$\sqrt[n]{a}=a^\frac{1}{n}\Rightarrow\sqrt[5]{x}=x^\frac{1}{5}\\\\\sqrt[5]{x}\cdot\sqrt[5]{x}\cdot\sqrt[5]{x}\cdot\sqrt[5]{x}=x^\frac{1}{5}\cdot x^\frac{1}{5}\cdot x^\frac{1}{5}\cdot x^\frac{1}{5}\qquad\text{use}\ a^n\cdot a^m=a^{n+m}\\\\=x^{\frac{1}{5}+\frac{1}{5}+\frac{1}{5}+\frac{1}{5}}=x^\frac{4}{5}$

4 0

3 years ago

Read 2 more answers